CN209526655U

CN209526655U - A kind of while compatible mono- both end power supplying built-in power of Type A+B

Info

Publication number: CN209526655U
Application number: CN201920559013.0U
Authority: CN
Inventors: 王兴华; 周礼华; 刘小兵
Original assignee: Shenzhen City Mega Lighting Ltd By Share Ltd
Current assignee: Shenzhen City Mega Lighting Ltd By Share Ltd; Shenzhen MTC Co Ltd
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2019-10-22
Anticipated expiration: 2029-04-23

Abstract

The utility model discloses a kind of while compatible mono- both end power supplying built-in powers of Type A+B; including excess temperature disconnect protection circuit, high-frequency filter circuit, it is complete send type EMI filter rectifier, leakage current protection circuit, High Power Factor low THD constant current protection circuit and both-end Type A when lighting compatible circuit; the excess temperature disconnect protection circuit by the high-frequency filter circuit be connected with it is described it is complete send type EMI filter rectifier, the input terminal electric connection of circuit is protected in the full output end THD constant current low with the High Power Factor for sending type EMI filter rectifier；It is compatible strong, compatible Most electronic ballast, compatible single-ended mains-supplied circuit, while can be with compatible both-end mains-supplied circuit；Defencive function is more, and Temperature protection excess temperature disconnects protection, open-circuit-protection, short-circuit protection, constant current protection, overvoltage protection, prevents because of fire incident caused by bad；It is easy to use, saving operating expenses is directly replaced without changing route.

Description

A kind of while compatible mono- both end power supplying built-in power of Type A+B

Technical field

The utility model relates to fluorescent tube technical field, in the specially a kind of while compatible mono- both end power supplying of Type A+B Set power supply.

Background technique

Using LED made of semiconductor PN light emitting source come out in the 1960s, with LED industry development, LED Lighting engineering is constantly mature.The advantages that light source product made of LED is with its high photosynthetic efficiency, long-life, makes LED illumination industry entry In the high speed development stage, traditional lighting products are replaced at last.Raising with society to power conservation requirement, more and more LED lights Source is required there is dimming function.It is a kind of can compatible ballast input and alternating current input, while the power supply for having both switch dimming function will It significantly facilitates and realizes more preferably energy-saving effect while we substitute common fluorescent tube.

It is double-width grinding that ballast, which inputs (Type A), generally in order to which by safety electric leakage current test, alternating current input can be done At single ended input (Type B), if a kind of circuit can be compatible with single-ended AC input (Type B) and the input of both-end ballast (Type A), i.e. support Type A+Type B input, to new clothes fluorescent tube or directly replace original fluorescent tube, not shadow The illumination work of LED is rung, this is the advantage place of this compatible input.

For ballast in booting moment, the voltage at both ends generally reaches 800V or higher, if being directly connected to rectifier bridge Circuit artificail commutation, based on the power circuit design that so high input voltage is made, meeting is more complicated, interference is more, is more difficult to control System, cost are higher, and can't be compatible with alternating current input.If a partial pressure route is designed before rectifier bridge, after making rectification Voltage can with alternating current input it is comparable, this means that can input (Type B) with alternating current shares subsequent switch power supply Road.

However in the prior art under same luminous flux, fluorescent tube power is high, and light efficiency is low, and the service life is short；

It is adapted to the LED lamp tube sold in the market, alternating current single-ended power, both end power supplying or electric ballast can only be compatible with, Three kinds of modes can not be compatible with simultaneously to use, so will cause expensive change line construction expense；For this purpose, proposing a kind of while simultaneous Hold the mono- both end power supplying built-in power of Type A+B.

Utility model content

The purpose of this utility model is to provide a kind of while compatible mono- both end power supplying built-in powers of Type A+B, to solve The problems mentioned above in the background art.

To achieve the above object, the utility model provides the following technical solutions: a kind of while compatible mono- both-end of Type A+B It powers built-in power, including excess temperature disconnects protection circuit, high-frequency filter circuit, complete sends type EMI filter rectifier, leakage current Lighting compatible circuit when protecting the low THD constant current protection circuit of circuit, High Power Factor and both-end Type A, wherein alternating current input Mode is known as Type B, and ballast input mode is known as Type A,

The excess temperature, which disconnects protection circuit and is connected with by the high-frequency filter circuit, described complete sends type EMI filter rectification electricity Road, the input of the full output end THD constant current protection circuit low with the High Power Factor for sending type EMI filter rectifier End is electrically connected；

The output end of the low THD constant current protection circuit of the High Power Factor is electrically connected with the leakage current protection circuit, The leakage current protection circuit includes intelligent power protective switch chip U2, power input interface V bus anode and power input Interface V bus cathode, the power input interface V bus anode pass through the diode D10 and resistance R7, R8, R9 being serially connected It is connect with 8 feet of the intelligent power protective switch chip U2, the 8 feet connection of the intelligent power protective switch chip U2 is logical Cross capacitor C3 ground connection；

Lighting compatible circuit includes ac power input end AC IN when the both-end Type A, the AC power source input End AC IN passes sequentially through capacitor C8, and diode D8, resistance R21 are connect with the grid G of metal-oxide-semiconductor Q2, the ac power input end AC IN also passes through diode D9 and connect with the source S of the metal-oxide-semiconductor Q2, and one end of the resistance R21 is connected with parallel with one another Capacitor C11, resistance R23 and diode D23, and the two sides of the resistance R23 are respectively equipped with the capacitor C11 and the diode The drain D of D23, the metal-oxide-semiconductor Q2, the source S of metal-oxide-semiconductor Q2, the cathode of capacitor C11, resistance R23, diode D9 cathode and The cathode of diode D23 is grounded.

As the technical program further preferred that it includes four groups of Thermal Cutoffs that the excess temperature, which disconnects protection circuit, F1, F2, F3, F4, described Thermal Cutoffs F1, F2 are parallel with one another, and the high-frequency filter circuit includes capacitor CX1, CX2, described Thermal Cutoffs F1 is connected by the capacitor CX1 with the Thermal Cutoffs F3, and the Thermal Cutoffs F1 passes through described Capacitor CX2 is connected with the Thermal Cutoffs F4.

As the technical program further preferred that it is described it is complete send type EMI filter rectifier include two groups of rectifier bridges BD1, BD2,1 foot of the rectifier bridge BD1 are connect with the ac power input end AC IN, rectifier bridge BD1, BD2 described in two groups 4 feet be connected and be grounded, 1,3 feet of the rectifier bridge BD2 are connected with the Thermal Cutoffs F4 and Thermal Cutoffs F3 It connects, 2 feet of rectifier bridge BD1, BD2 described in two groups are connected, and the output end of the rectifier bridge BD1 is parallel with one another by one group Drum inductance L1 and resistance R1 are connect with one end of capacitor CB2, and the output end of the rectifier bridge BD1 also passes through capacitor CB1 and one Group resistance R8 parallel with one another is connected with drum inductance L2, the other end ground connection of the capacitor CB2, and the two of the capacitor CB1 End is connected with the power input interface V bus anode, power input interface V bus cathode respectively.

As the technical program further preferred that the low THD constant current protection circuit of the High Power Factor includes single-stage Be depressured pfc controller U1,1 foot of the single-stage buck pfc controller U1 respectively with four groups of resistance Rs1, Rs2 parallel with one another, Rs3 is connected with one end of Rs4, and the other end of resistance Rs1, Rs2, Rs3 and Rs4 are grounded, the single-stage buck PFC control One group of capacitor C4, C5 parallel with one another, and the cathode ground connection of capacitor C4, the single-stage buck are equipped between 5 feet and 2 feet of device U1 5 feet of pfc controller U1 are connected with resistance R2, R5, R10 that one group is serially connected, the single-stage buck PFC controller U1 5 feet connect by the positive of resistance R13 and diode D4, the cathode of the diode D4 respectively with resistance parallel with one another R14 is connect with transformer T1B, and the other end of the resistance R14 is grounded by resistance R15, the single-stage buck pfc controller U1 4 feet be connected between the resistance R14 and resistance R15,3 feet of the single-stage buck pfc controller U1 pass through capacitor C6, electricity Resistance R19 is connect with the anode of capacitor C9, and the anode of the capacitor C9 is also connected with resistance R20, R22 connection being serially connected, institute The grid G by one group of resistance R11 parallel with one another and diode D3 and metal-oxide-semiconductor Q1 for stating single-stage buck pfc controller U1 connects It connects, one group of resistance R11 and diode D3 parallel with one another are connect by resistance R12 with the source S of the metal-oxide-semiconductor Q1, institute The cathode ground connection for stating capacitor C9, is grounded between the capacitor C6 and resistance R19 by resistance R16, the transformer T1B's is another End ground connection.

As the technical program further preferred that the low THD constant current protection circuit of the High Power Factor further includes drop Press through pressure open loop protection circuit, the decompression over-voltage open loop protection circuit include resistance R3, R4, R24, capacitor C1, C2, CE1, Diode D1, D2 and transformer TIA, the resistance R4 are serially connected with the capacitor C1, the resistance R3, capacitor CE1 and two It is parallel with one another between pole pipe D1, D2, transformer TIA, the resistance are connected between the capacitor CE1 and the cathode of diode D2 The both ends of R3 are connect with LED light positive and negative anodes respectively, and the cathode of the capacitor CE1 is grounded by resistance R24 and capacitor C2, the drop The input terminal for pressing through open loop protection circuit is connect with the other end of the resistance R2 and resistance R22 respectively.

As the technical program further preferred that the excess temperature disconnect protection circuit respectively with alternating current firewire and alternating current Zero curve connection.

Compared with prior art, the utility model has the beneficial effects that the utility model,

1, compatibility is strong, compatible Most electronic ballast, compatible single-ended mains-supplied circuit, while can be with Compatible both-end mains-supplied circuit；

2, defencive function is more, and Temperature protection excess temperature disconnects protection, open-circuit-protection, constant current protection, overvoltage protection, prevents because not Fire incident caused by good；

3, easy to use, saving operating expenses is directly replaced without changing route；

4, the utility model can be realized a like products and can be used in different places without changing any route Under the conditions of can directly or be replaced, versatility and the wide model of compatibility save construction cost, and can be made into different sizes Or the fluorescent tubes such as common T5/T8/T12: the products such as 0.6m/0.9m/1.2m/1.5m/2.0m.

The power circuit versatility and compatible strong and wide model, have power supply strip embedded and two kinds of power supply plug type are done Method, general common structural member currently on the market -- glass tube/half aluminium half moulds/overall plastic shape fluorescent tube, without customization die sinking knot again Component.

Detailed description of the invention

Fig. 1 is the circuit diagram of the utility model；

Fig. 2 is the leakage current protection circuit figure of the utility model；

Lighting compatible circuit figure when Fig. 3 is the both-end Type A of the utility model.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

Embodiment

Please refer to Fig. 1-3, the utility model provides a kind of technical solution: a kind of while compatible mono- both-end of Type A+B supplies Electric built-in power, including excess temperature disconnect protection circuit, high-frequency filter circuit, it is complete send type EMI filter rectifier, leakage current protect Lighting compatible circuit when circuit and both-end Type A are protected in the low THD constant current of protection circuit, High Power Factor, wherein alternating current input side Formula is known as Type B, and ballast input mode is known as Type A, and the excess temperature disconnects protection circuit and passes through the High frequency filter electricity Road be connected with it is described it is complete send type EMI filter rectifier, the full output end for sending type EMI filter rectifier and the height The input terminal of the low THD constant current protection circuit of power factor is electrically connected；It is described complete to send type EMI filter rectification electric in the present embodiment Both-end Type A+B standard leakage current protection circuit is realized on road, during compatible both end power supplying circuit fluorescent tube construction and installation, is Prevent another end PIN needle electrical shock protection function.

The output end of the low THD constant current protection circuit of the High Power Factor is electrically connected with the leakage current protection circuit, The leakage current protection circuit includes intelligent power protective switch chip U2, power input interface V bus anode and power input Interface V bus cathode, the power input interface V bus anode pass through the diode D10 and resistance R7, R8, R9 being serially connected It is connect with 8 feet of the intelligent power protective switch chip U2, the 8 feet connection of the intelligent power protective switch chip U2 is logical Cross capacitor C3 ground connection；In the present embodiment, the low THD constant current protection circuit of the High Power Factor can be realized Type A and B standard Middle High Power Factor, low THD, decompression, constant current, over-voltage, open loop protection circuit, protection product will not be opened extremely because of load lamp bead Lead to fire incident behind road

Specific in the present embodiment: the excess temperature disconnects protection circuit and includes four groups of Thermal Cutoffs F1, F2, F3, F4, Described Thermal Cutoffs F1, F2 are parallel with one another, and the high-frequency filter circuit includes capacitor CX1, CX2, the Thermal Cutoffs F1 Be connected by the capacitor CX1 with the Thermal Cutoffs F3, the Thermal Cutoffs F1 by the capacitor CX2 with it is described Thermal Cutoffs F4 is connected, and four groups of Thermal Cutoffs F1, F2, F3, F4 are Thermal Cutoffs, prevents from leading to temperature when poor contact It spends the raised excess temperature that arrives and disconnects defencive function, capacitor CX1, CX2 are High frequency filter effect.

Specific in the present embodiment: described complete to send type EMI filter rectifier include two groups of rectifier bridges BD1, BD2, institute 1 foot for stating rectifier bridge BD1 is connect with the ac power input end AC IN, and 4 feet of rectifier bridge BD1, BD2 described in two groups are connected It connects and is grounded, 1,3 feet of the rectifier bridge BD2 are connected with the Thermal Cutoffs F4 and Thermal Cutoffs F3, described in two groups 2 feet of rectifier bridge BD1, BD2 are connected, the output end of the rectifier bridge BD1 by one group of drum inductance L1 parallel with one another and Resistance R1 is connect with one end of capacitor CB2, and the output end of the rectifier bridge BD1 also passes through capacitor CB1 and one group parallel with one another Resistance R8 is connected with drum inductance L2, the other end of capacitor CB2 ground connection, the both ends of the capacitor CB1 respectively with it is described Power input interface V bus anode, power input interface V bus cathode are connected.

Specific in the present embodiment: the low THD constant current protection circuit of the High Power Factor includes single-stage buck PFC control Device U1,1 foot of the single-stage buck pfc controller U1 respectively with four groups of resistance Rs1, Rs2, Rs3 and Rs4 parallel with one another one End connection, and the other end of resistance Rs1, Rs2, Rs3 and Rs4 are grounded, 5 feet and 2 feet of the single-stage buck pfc controller U1 Between be equipped with one group of capacitor C4, C5 parallel with one another, and capacitor C4 cathode ground connection, the 5 of the single-stage buck pfc controller U1 Foot is connected with resistance R2, R5, R10 that one group is serially connected, and 5 feet of the single-stage buck pfc controller U1 pass through resistance The anode of R13 and diode D4 connects, the cathode of the diode D4 respectively with resistance R14 and transformer T1B parallel with one another Connection, the other end of the resistance R14 are grounded by resistance R15, and 4 feet of the single-stage buck pfc controller U1 are connected to institute It states between resistance R14 and resistance R15,3 feet of the single-stage buck pfc controller U1 pass through capacitor C6, resistance R19 and capacitor C9 Anode connection, the anode of the capacitor C9 be also connected be serially connected resistance R20, R22 connection, the single-stage buck PFC Controller U1's is connect by one group of resistance R11 and diode D3 parallel with one another with the grid G of MOS pipe Q1, it is described mutually simultaneously The one group of resistance R11 and diode D3 of connection are connect by resistance R12 with the source S of the metal-oxide-semiconductor Q1, and the capacitor C9's is negative Pole ground connection, is grounded between the capacitor C6 and resistance R19 by resistance R16, the other end ground connection of the transformer T1B.

Specific in the present embodiment: the low THD constant current protection circuit of the High Power Factor further includes that decompression over-voltage open circuit is protected Protection circuit, the decompression over-voltage open loop protection circuit include resistance R3, R4, R24, capacitor C1, C2, CE1, diode D1, D2 and Transformer TIA, the resistance R4 is serially connected with the capacitor C1, between the resistance R3, capacitor CE1 and diode D1, D2 It is parallel with one another, transformer TIA, the both ends difference of the resistance R3 are connected between the capacitor CE1 and the cathode of diode D2 It is connect with LED light positive and negative anodes, the cathode of the capacitor CE1 is grounded by resistance R24 and capacitor C2, and the decompression over-voltage open circuit is protected The input terminal of protection circuit is connect with the other end of the resistance R2 and resistance R22 respectively.

Specific in the present embodiment: the excess temperature disconnects protection circuit and connect respectively with alternating current firewire and alternating current zero curve.

Working principle or structural principle, in use, work is in Type B: disconnecting four in protection circuit by excess temperature Group Thermal Cutoffs F1, F2, F3, F4 Temperature protection, which is filtered to capacitor CX1/CX2 into complete, sends type EMI filter rectification electric Road, then resistance R2, R5, R10 allow single-stage buck pfc controller to start work in the low THD constant current protection circuit of High Power Factor The mode that resistance R11, R12, diode D3 change duty ratio to metal-oxide-semiconductor Q1 driving that is powered makes diode D1, D2, resistance RS1, RS2, RS3, RS4, transformer T1A, capacitor CE1 are depressured and passing through capacitor CE1 maintenance can allow work LED normally to light, while single Grade decompression the 4th foot of pfc controller U1 passes through resistance R14, R15, transformer T1B, T1A, metal-oxide-semiconductor Q1, diode D1, D2 composition Decompression, over-voltage, open loop protection circuit, and the 1st foot of single-stage buck PFC controller U1 is by resistance RS1, RS2, RS3, RS4 and Metal-oxide-semiconductor Q1 forms current foldback circuit.Circuit and LED and leakage current protection circuit are protected by the low THD constant current of High Power Factor Behind composition circuit by the 5th foot of intelligent power protective switch chip U2 and R17, R18 detect current potential judgement be human body or LED just MOS conducting built in the 3rd, 4,2 foot of intelligent power protective switch chip U2 is allowed to carry out switch leakage current protection after normal open electricity.

Work is in Type A: it is powered on the basis of Type B based on work and holds C8, diode D8, D9, resistance R21, It allows metal-oxide-semiconductor Q2 short-circuit intelligent power protective switch chip circuit is connected reaches compatible electronic ballast and reach and lights LED.Work simultaneously Work energization capacitor C8 in Type B with the characteristic of logical exchange stopping direct current and makes metal-oxide-semiconductor Q2 shutdown reach electric leakage plus resistance R23 Flow protective effect.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims

1. a kind of while compatible mono- both end power supplying built-in power of Type A+B, including excess temperature disconnect protection circuit, High frequency filter electricity Type EMI filter rectifier, leakage current protection circuit, High Power Factor low THD constant current protection circuit and both-end Type complete are sent in road Lighting compatible circuit when A, wherein alternating current input mode is known as Type B, and ballast input mode is known as Type A, and feature exists In:

The excess temperature disconnect protection circuit by the high-frequency filter circuit be connected with it is described it is complete send type EMI filter rectifier, The input terminal electricity of the full output end THD constant current protection circuit low with the High Power Factor for sending type EMI filter rectifier Property connection；

The output end of the low THD constant current protection circuit of the High Power Factor is electrically connected with the leakage current protection circuit, described Leakage current protection circuit includes intelligent power protective switch chip U2, power input interface V bus anode and power input interface V Bus cathode, the power input interface V bus anode pass through the diode D10 that is serially connected and resistance R7, R8, R9 with it is described 8 feet of intelligent power protective switch chip U2 connect, and the 8 feet connection of the intelligent power protective switch chip U2 passes through capacitor C3 Ground connection；

Lighting compatible circuit includes ac power input end AC IN, the ac power input end AC when both-end Type A IN passes sequentially through capacitor C8, and diode D8, resistance R21 are connect with the grid G of metal-oxide-semiconductor Q2, the ac power input end AC IN It is also connect by diode D9 with the source S of the metal-oxide-semiconductor Q2, one end of the resistance R21 is connected with capacitor parallel with one another C11, resistance R23 and diode D23, and the two sides of the resistance R23 are respectively equipped with the capacitor C11 and the diode D23, Drain D, the source S of metal-oxide-semiconductor Q2, the cathode of capacitor C11, resistance R23, the cathode of diode D9 and two poles of the metal-oxide-semiconductor Q2 The cathode of pipe D23 is grounded.

2. the according to claim 1 a kind of while compatible mono- both end power supplying built-in power of Type A+B, it is characterised in that: institute Stating excess temperature and disconnecting protection circuit includes four groups of Thermal Cutoffs F1, F2, F3, F4, and described Thermal Cutoffs F1, F2 are parallel with one another, The high-frequency filter circuit includes capacitor CX1, CX2, and the Thermal Cutoffs F1 passes through the capacitor CX1 and the Temperature protection Silk F3 is connected, and the Thermal Cutoffs F1 is connected by the capacitor CX2 with the Thermal Cutoffs F4.

3. the according to claim 2 a kind of while compatible mono- both end power supplying built-in power of Type A+B, it is characterised in that: institute State that complete to send type EMI filter rectifier include two groups of rectifier bridge BD1, BD2,1 foot of the rectifier bridge BD1 and the AC power source Input terminal AC IN connection, 4 feet of rectifier bridge BD1, BD2 described in two groups are connected and are grounded, 1,3 feet of the rectifier bridge BD2 with The Thermal Cutoffs F4 is connected with Thermal Cutoffs F3, and 2 feet of rectifier bridge BD1, BD2 described in two groups are connected, described whole The output end of stream bridge BD1 is connect by one group of drum inductance L1 and resistance R1 parallel with one another with one end of capacitor CB2, described whole The output end of stream bridge BD1 also passes through capacitor CB1 and is connected with one group of resistance R8 parallel with one another and drum inductance L2, the capacitor The other end of CB2 is grounded, the both ends of the capacitor CB1 respectively with the power input interface V bus anode, power input interface V bus cathode is connected.

4. the according to claim 1 a kind of while compatible mono- both end power supplying built-in power of Type A+B, it is characterised in that: institute Stating the low THD constant current protection circuit of High Power Factor includes single-stage buck pfc controller U1, the single-stage buck pfc controller U1 1 foot connect respectively with one end of four groups of resistance Rs1, Rs2, Rs3 and Rs4 parallel with one another, and resistance Rs1, Rs2, Rs3 and The other end of Rs4 is grounded, and one group of capacitor parallel with one another is equipped between 5 feet and 2 feet of the single-stage buck pfc controller U1 C4, C5, and the cathode ground connection of capacitor C4,5 feet of the single-stage buck pfc controller U1 and one group of resistance R2 being serially connected, R5, R10 are connected, and 5 feet of the single-stage buck pfc controller U1 are connect by resistance R13 with the anode of diode D4, described The cathode of diode D4 is connect with resistance R14 parallel with one another with transformer T1B respectively, and the other end of the resistance R14 passes through Resistance R15 ground connection, 4 feet of the single-stage buck pfc controller U1 are connected between the resistance R14 and resistance R15, the list 3 feet of grade decompression pfc controller U1 are connect by capacitor C6, resistance R19 with the anode of capacitor C9, and the anode of the capacitor C9 is also It is connected with resistance R20, R22 connection being serially connected, the single-stage buck pfc controller U1's passes through one group of electricity parallel with one another Resistance R11 and diode D3 is connect with the grid G of metal-oxide-semiconductor Q1, and one group of resistance R11 and diode D3 parallel with one another pass through electricity Resistance R12 is connect with the source S of the metal-oxide-semiconductor Q1, and the cathode ground connection of the capacitor C9 is led between the capacitor C6 and resistance R19 Cross resistance R16 ground connection, the other end ground connection of the transformer T1B.

5. the according to claim 4 a kind of while compatible mono- both end power supplying built-in power of Type A+B, it is characterised in that: institute Stating the low THD constant current protection circuit of High Power Factor further includes decompression over-voltage open loop protection circuit, the decompression over-voltage open-circuit-protection Circuit includes resistance R3, R4, R24, capacitor C1, C2, CE1, diode D1, D2 and transformer TIA, the resistance R4 and the electricity Hold C1 to be serially connected, parallel with one another between the resistance R3, capacitor CE1 and diode D1, D2, the capacitor CE1 and diode Transformer TIA is connected between the cathode of D2, the both ends of the resistance R3 are connect with LED light positive and negative anodes respectively, the capacitor CE1 Cathode be grounded by resistance R24 and capacitor C2, the input terminal of the decompression over-voltage open loop protection circuit respectively with the resistance R2 is connected with the other end of resistance R22.

6. the according to claim 1 a kind of while compatible mono- both end power supplying built-in power of Type A+B, it is characterised in that: institute Excess temperature disconnection protection circuit is stated to connect with alternating current firewire and alternating current zero curve respectively.